package edu.yuhf.jdbcpart;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

public class DBConnection {
	private final static String URL;
	private final static String USERNAME;
	private final static String PASSWORD;
	private final static String CLASSNAME;

		static {
			Properties prop=new Properties();
			try {
			prop.load(DBConnection.class.getResourceAsStream("/jdbc.properties"));
			}catch (IOException e) {
				// TODO: handle exception
				System.out.println("jdbc.properties file not found,error message is"+e.getMessage());
			}
			URL=prop.getProperty("jdbc.url");
			USERNAME=prop.getProperty("jdbc.userName");
			PASSWORD=prop.getProperty("jdbc.password");
			CLASSNAME=prop.getProperty("jdbc.className");
			try {
				Class.forName(CLASSNAME);
			} catch (ClassNotFoundException e) {
				System.out.println("Class not found,errpr message is" + e.getMessage());
			}
		}
		
		
		public static Connection getConnection() {
			Connection connection=null;
			try {
			connection=DriverManager.getConnection(URL, USERNAME, PASSWORD);
			}catch (SQLException e) {
				System.out.println("database connection errpr ,message is" + e.getMessage());
			}
			return connection;
		}
		
		
		public static void closeConnection(Connection connection) {
			if(null!=connection) {
				try {
					connection.close();
				}catch (SQLException e) {
					System.out.println("database connection errpr ,message is" + e.getMessage());
				}
			}
		}
}
